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An Introduction to Deformation. A review of terms and concepts. Definition of homogeneous deformation. Material lines that were originally straight remain straight after deformation Material lines that were originally parallel are still parallel after deformation
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An Introduction to Deformation A review of terms and concepts
Definition of homogeneous deformation • Material lines that were originally straight remain straight after deformation • Material lines that were originally parallel are still parallel after deformation • The ratio of lengths of straight lines in a particular direction are the same • Implicit in this and the rest of the discussion is the presence of a strain marker
Description of secondary structures in terms of deformation • Mineralogy? • What records the deformation (strain marker)? • Flattening, constriction, plane strain? • Is there evidence that shear was involved? • Continuous or discontinuous? • Homogeneous or heterogeneous? If the latter, can it be divided into homogeneous parts? • Interpretation: rock type, name of structure